Usually, your home must meet SEAI’s heat-loss requirements for a heat pump grant, so insulation and airtightness can affect eligibility. A registered technical advisor assesses the property and may recommend attic, wall or floor insulation before the heat pump is installed. You may be able to apply for separate insulation support, but the work and grant conditions depend on your home and circumstances. Check the latest rules on the SEAI website and ask a registered heat pump contractor to confirm what your property may require.